A person is standing on a platform. As e...

A person is standing on a platform. As engine while approaching the platform blows a whistle , the frequency of which is 100 Hz.The speed of engine is `108 km h^(-1)` and speed of sound is `340 ms^(-1)`.Calculate the appearent frequency of the whistle as heard by the person.

Text Solution

Verified by Experts

The correct Answer is:

109.7 Hz

Topper's Solved these Questions

VECTORS
SL ARORA|Exercise Problems For Self Practice|56 Videos
Waves
SL ARORA|Exercise EXERCISE|558 Videos

Similar Questions

Explore conceptually related problems

An automobile moving at 30 m/s is approaching a factory whistle that has a frequency of 500 Hz. If the speed of the sound in air is 340 m/s, then the apparent frequency of the whistle as heard by the driver is

A person is standing on a railway platform.An engine blowing a whistle of frequency 640 Hz approaches him with a speed of 72 km /hr,The frequency of the note heard by the person is (velocity of sound is 340 m/s )

A engine is approaching a hill at constant speed. When it is at a distance of 0.9 km , it blows a whistle, whose echo is heard by the driver after 5 s . If the speed of sound is 340 m//s , calculate the speed of the engine.

A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. The train begins to move with a speed of 30 m s^(- 1) towards the platform. The frequency of the sound heard by an observer standing on the platform is (Speed of sound in air = 330 m s^(-1) )

A man standing on a platform observes that the frequency of the sound of a whistle emitted by a train drops by 140 Hz. If the velocity of sound in air is 330 m/s and the speed of the train is 70 m/s, the frequency of the whistle is

A boy riding on a bicycle going at 12 km h^-1 towards a vertical wall whistles at his dog on the ground. If the frequency of the whistle is 1600 Hz and the speed of sound in air is 330 m s^-1, find (a) the frequency of the whistle as received by the wall (b) the frequency of the reflected whistle as received by the boy.

SL ARORA-WAVE MOTION-All Questions

A person is standing on a platform. As engine while approaching the pl...
Text Solution
|
A hospital uses an ultrasonic scanner to locate tumour in a tissue. Wh...
Text Solution
|
A radio station broadcasts its programme at 219.3 metre wavelength. De...
Text Solution
|
The audible range of a human ear is 20 Hz to 20 kHz. Convert this into...
Text Solution
|
A bat emits ultrasonic sound of frequency 1000 kHz in air. If the soun...
Text Solution
|
A stone dropped from the top of a tower of height 300 m high splashes...
Text Solution
|
How far does sound travel in air when a tuning fork of frequency 560 H...
Text Solution
|
A source of sound is placed at one end of an iron bar 2 km long. Two s...
Text Solution
|
Audible frequencies have a range 20 Hz to 20,000 Hz. Express this rang...
Text Solution
|
For aluminium , the modulus of rigidity is 2.1xx10^(10)Nm^(-2 and dens...
Text Solution
|
The mass of a 4.0 m long wire is 0.01 kg, and it is stretched by a for...
Text Solution
|
A steel wire has a length of 12.0m and a mass of 2.10kg. What should b...
Text Solution
|
A string of mass 2.50kg is under a tension os 200N. The length of the ...
Text Solution
|
A copper wire is held at the two ends by rigid supports. At 30^(@)C, t...
Text Solution
|
In a sonometer experiment, the density of material of the wire used in...
Text Solution
|
For aluminium the bulk modulus and modulus of rigidity are 7.5xx10^(10...
Text Solution
|
For a steel rod, the Young's modulus of elasticity is 2.9xx10^(11)N//m...
Text Solution
|
At a pressure of 10^(5)N//m^(2), the volumetric strain of water is 5xx...
Text Solution
|
Estimate the speed of sound in air at standard temperature and pressur...
Text Solution
|
At what temperature will the speed of sound be double its value at 273...
Text Solution
|
By how much the wave velocity increases for 1^(@)C rise of temperature...
Text Solution
|